Support for service config rotation

[tetofonta]

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Description

Docker service configs rotation is described in the official wiki with the following checklist:

• Deploy the service with the corresponding configs (e.g. application_conf)
• Update the config file
• Create a new docker config from the updated file (application_conf_v2)
• Update the service removing the old config (application_conf) and adding the new one (application_conf_v2)

When updating a config file and re-applying the configuration, terraform throws an error because it tries to remove a config associated with a service. this makes the need of doing this procedure manually.

New or Affected Resource(s)

• docker_config
• docker_service (?)

Potential Terraform Configuration

Not changed.

References

• https://blog.github.com/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/